$ git clone -n https://src.fedoraproject.org/rpms/perl-Module-Build-Tiny.git /var/lib/mock/f39-build-1435650-32006/root/chroot_tmpdir/scmroot/perl-Module-Build-Tiny
Cloning into '/var/lib/mock/f39-build-1435650-32006/root/chroot_tmpdir/scmroot/perl-Module-Build-Tiny'...
$ git fetch origin 6697f0116fa73964f1dd1e470c3b0b87f06a0ae8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Module-Build-Tiny
 * [new ref]         6697f0116fa73964f1dd1e470c3b0b87f06a0ae8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6697f01 Update to 0.047